Emacs, switch to previous window

Question

In Emacs, C-x o takes me to the next window.

What keyboard macro takes me to the previous window in Emacs?

Answer 1

There are some very good and complete answers here, but to answer the question in a minimalist fashion:

 (defun prev-window ()
   (interactive)
   (other-window -1))

 (define-key global-map (kbd "C-x p") 'prev-window)